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Google : Op-Amp Level Shifter Level shifting a +/- 2.5V signal to 0 - 5V I have a front end module that generates an (ECG) signal that varies from +/-2.5 V. I want to shift this signal to 0 - 5V. What is the best way to do this? First thing to try is…

运算放大器大多数都是双电源的,这就要求有正负基准电压,除了从稳压源直接输出电压外,很多时候都是一个单电源对整个电路供电,这就要求要把正电压转换成负电压,从而产生正负的电压基准,对双电源运算放大器进行供电. 电路一:一个负精确电压基准通过使用MCP1525 或MCP1541 来产生如图所示 在这个电路中使用MCP606 和两个等值的电阻实现电压隔离.MCP1525电压基准的输出电压驱动R1,R1和MCP606放大器的反向输入连接.既然放大器的输入为0,第二个10KΩ电阻器被放置在放大器的反馈回路放…

源:5V与3.3V器件电平转换 当你使用3.3V的单片机的时候,电平转换就在所难免了,经常会遇到3.3转5V或者5V转3.3V的情况,这里介绍一个简单的电路,他可以实现两个电平的相互转换(注意是相互哦,双向的,不是单向的!).电路十分简单,仅由3个电阻加一个MOS管构成,电路图如下: 上图中,S1,S2为两个信号端,VCC_S1和VCC_S2为这两个信号的高电平电压.另外限制条件为: 1,VCC_S1<=VCC_S2. 2,S1的低电平门限大于0.7V左右(视NMOS内的二极管压降而定). 3,…

Must tri-state outputs and use an external resistor to pull up to 5V To drive 5V CMOS-level inputs, a pull-up resistor must be applied to the 5V Virtex output. Priorto driving a logic 1 data signal, the Virtex output must be tri-stated. This ensures…

问题: Arduino:1.6.3 (Windows 7), 板:"Arduino Pro or Pro Mini, ATmega328 (5V, 16 MHz)" Sketch uses 846 bytes (2%) of program storage space. Maximum is 30,720 bytes. 全局变量使用了9字节,(0%)的动态内存,余留2,039字节局部变量.最大为2,048字节. avrdude: stk500_recv(): programmer is…

源: 单片机电平转换电路5V 3.3V串口通讯等…

源: 实用的4~20mA输入/0~5V输出的I/V转换电路…

http://www.daycounter.com/Circuits/Level-Translators/Level-Translators.phtml Interfacing 5V and 3V logic circuits is a common task.  3V logic is preferred to 5V logic because it consumes less power, so most microcontrollers and peripheral devices use…

http://electronicdesign.com/boards/non-inverting-level-shifter-requires-only-one-op-amp-one-supply-voltage With portable battery-operated devices continuing to add functionality while shrinking in size, printed-circuit-board real estate becomes incre…